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Graphs of motion. 0 acceleration. Constant + ve acceleration. Constant - ve acceleration. Area under graph. gradient. Area under graph. Area under graph. Random Motion. Kinetic Theory. Small fast moving air particles hit slow fast moving smoke particles- Brownian Motion. - PowerPoint PPT Presentation
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Constant -ve acceleration
Constant +ve acceleration
gradient
Graphs of motion
0 acceleration
Area under graph
Area under graph
Area under graph
Random Motion
Small fast moving air particles hit slow fast
moving smoke particles- Brownian
Motion
Small volume, more collisions with wall,
more pressure
Higher temp. more collision with wall,
more pressure
Pressure- hits the walls of the container
• tightly packed, regular shape
• Vibrate• Little free
space
• close together with no regular arrangement
• Slide over each other
• Little free space
Kinetic Theory
• well separated with no regular arrangement
• move randomly at high speeds
• Lots of free space
Cooling process
The larger surface area has more surface
molecules so more evaporation takes place
The wind molecules hit the surface
molecules thereby removing it from
liquid
Heat provides more energy to surface molecules thereby
increasing evaporation rate
Evaporation of water from the skin removes heat energy from the skin thereby cooling the skin
Escape of more energetic molecules from the surface of liquid
F=1/T refraction
reflectionv = f x ƛ
Period-Time taken for 1 wave to pass a point
Frequency is the number of waves passing a point in
one second
Wavefronts
Transfers energy
Waves
diffraction
Transverse- particles move 90° to wave
motion
Longitudinal-particles move parallel to wave
motion
Low speed, small wavelength
High speed, large wavelength
Q=E = mcϪT
Thermal capacity
C-Specific heat capacity of a substance is the energy required to raise the temperature of 1kg of substance by 1C
Lf- latent heat of fusion is the energy required to melt 1kg of substance without changing its temperature.
E =P x t = VIt
Hotter body has more internal
energy
Higher SHC takes longer to
get hot
Lv-e latent heat of vaporisation is the energy required to boil 1 kg of a substance into gas without changing its temperature.
V,I,t,T,m
VirtualLaterally invertedSame size as the objectSame distance behind the mirror as the object is in front
Refractive index, n = sin i/sin r
Or
c =3 x 108 m/s
Fiber optics
DispersionROYGBIVReflection Refraction
Light
i <cr
i = cr
i > cr
Gate X Usually Lets In More Radiation- order of wavelength
Vacuum-3 x 108 m/s
Electromagnetic Spectrum
Monochromatic light